What is this medicine called "Cassapier"?

I’ve moved into a new house and I’m unpacking some things that I forgot I had. One of them is an old bottle of a liquid medicine called Cassapier from a pharmacist in Virginia. It’s a pale yellow color. I think it belonged to my grandfather which would make it 50-100 years old. the container is a glass bottle with a cork and a glue-on label. I can’t find any information about it online.